question_answer

A body takes just twice as long to slide down a plane inclined at \[30{}^\circ ,\] to the horizontal as if the plane were frictionless, The coefficient of friction between the body and the plane is:

A) \[\frac{\sqrt{3}}{4}\]                                     

B)  \[\sqrt{3}\]                       

C)  \[\frac{4}{3}\]                  

D)         \[\frac{3}{4}\]